Machine for extruding plastic materials



Dec. 26, 1922.

S. FREEMAN ET AL MACHINE FOR EXTRUDING PLASTIC MATERIALS Filed Sept. 21, 1921 2 Sheef s-Sheet 1 MM EXZZ4 041701 6 Dec. 26, 1922 s; FREEMAN ETAL 1,440,007

7 MACHINE FOR EXTRUDING PLASTIC MATERIALS Filed Sept. 21, 1921 2 Sheets-Sheet 2 new nears,- 1922i} Miran STATES PATENT OFFICE.

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. Application filed September 21, 1921. Serial No. 502,263.

' To allwhom it may concern) Be it known that SPENCER FREEMAN and RICHARD OToonn'pothsubjects of the King of Great Britain and Ireland, -1'esiding al7,

, 5' respectively, 55 Aspenlea Road, Hammersmith,' in the count of London, England,

and 30 Shaftsbury the' county of London, England, have in- I vented new and useful Improvements in and IQ Bel'ating'to Machines for Extruding Plas tic Materials, of" which the following is a specification. ,This invention relates to improvements in machines for extruding plastic materials, particular reference to the extrusion nozzle of such machines and has for its object the provision of means whereby a continuous pattern of any typecan easily, expeditiously and economically lie-applied to the extruded material and a better product can be made from substance of poor quality with less eifort than obtains with "known devicesl r The invention consists in the arrange ment of a plurality of rollers the axes of which are disposed at right angles to the extrudedmaterial so that portions ofthe peripheries of the said rollers will form a" V ,saids'tuds it being adapted to pass through the apertures 2' formed in the forks 9 when complete extrusion orifice, suitable pat-r terns being formed as desired in or on the parts of the peripheries which when associated form the orifice; means adapted to '3 enable the pa n to easily PP means adapted to maintain. a predetermined .35 angular relation of any roller about its axis of rotation to adjacent rollers during rotation-to enable the pattern on adjacent sides of the extruded material to;properly join; means adapted to enable any roller to to be angularly. adjusted about its axis relative .to adjacent rollers to enable the pat- .tern on adjacent sidesof the extruded ma te'rial to be properly joined; and means adapted to prevent back spew of the material beingextruded.

'In order that the inventionrnay'be the better understood we will now proceed to describe the same in relation to the accompanying drawings, reference being had, to

to the letters and figures marked thereon.

Like letters refer to like parts in the various figures in W hich:-. Fig. 1 is a sectional longitudinal elevaportion. oad, Hammersmith, in

tion of an improved extrusion nozzle strncted 111 accordance wlth this invention.

Fig. 2 is an end elevation of the extrusionnozzle illustrated in Fig. 1. Fig. 3 is a perspective view of the nose 7 Fig. 4: is a perspective view of one roller ,fork. I j v Fi 5 is a seetional'elevation of a roller,

ig. 6 is aperspective view of one and class of extruded material.

Referring to the drawings the machine head a has a tubular extension I) molmted thereon by the flange c; this tubular extension 6 enables the mandrel 65 to be properly held in place and perform its usual function. I 7 On the endof the extension 6 remote from the head a anose piece e is mounted said nose piece e having pairsof ears or lugs f arranged on that part which is in proximity to the tubular extension 6. Between each pair of ears or lugs f a fork g disposed, pivot screws g ,being provided to ma' tain the forks g in position and at the same time allow of movement of the forks gin a definite plane.

In the nose piece 6 studs h are arranged the forks g are in operative position. The studs 2 are provided'with nuts 3' adapted to lock the. forks g in position said forks g having gauge screws k to enable the location of the forks to be easily determined.

A roller Z is disposed between the jaws m of each fork g and is mounted on an arbor a which is journalled in the jaws The arbor a mayhave akey or the like 0 adaptarbor m, to be eflected relative to the angular position of the adjacent rollers By means of this angular adjustment the pattern actually impressed on two adjacent relatively to surfaces of i the extruded article may be arranged to join up as shown inFig. 6 and owing to the similar peripheral speed of all the rollers Z this condition may be maintained;

It will be seen on inspection of F 2 that the peripheries of the rollers Z form an orifice of substantially complete contour but it will be obvious that under some conditionsiit may be necessary to. form the orifice by such peripheries extended. Immediately behindthe rollers ,Z a suitable shrouding rv is provided to prevent back spew of the material being extruded], said shrouding being threaded into the end of the nose piece 6, whereby the shrouding may be adjusted the orifice formed between the rollersZ. 1

To enable the pattern on the roller Z to be readily changed orrenewed the tread portion of the rollers Z carrying the pattern is removed thus producing a spool like dewhich the pattern Zt'is forced or knurled vice comprising a hub Z and flanges 1 v The flanges Z of the saidspool like device may be so formed as shown in Fig. 5 if-desired so'as: to enable them to act as trimmer,

device's if made of metal of a comparatively hard character. I i j The portion of the tread removed is replaced by an insertion P of soft metal into '4 thereby enabling special pattern rollers Z 4 to be quickly and cheaply produced asrequired and obviating the necessity ofstorin or manufacturing a larger number of be usefully employed. l v I Obviouslywhen a set of rollers Z are no ro ers Z having speclal patterns than can I longer required or are inefficient through wear the soft metal insertion Z having the pattern .may .be easily removed and after renewing the soft metal insertioml any re-' quired pattern can be impressed therein so as to produce an efficient patterned roller Z.

We claim:- 1. An improved nozzle for machines for extruding plastic material comprising a plurality of rollers the axes of which are disposed at right angles to the axis of the material being extruded means adapted to associate the rollers to form an extrusion orifice .the complete contour of which is bounded by portions of -the peripheries of the rollers a shrouding for delivering extruded material to' the extrusion orifice bounded by portions of the peripheries of the rollers,- said shrouding being adjustable relatively to said orifice.

2. An improved extruding "nozzle, as claimed in claim 1, characterized by the arrangement of means for maintaining a predetermined angular relation of any roller rollers being formed with a tread 0 soft metal for the reception of a pattern impression under pressure said tread ofsoft metal being disposed between flanges-pf harder metal which operate as trimming devices.

In testimonywhereof we have'signed our names ,to this specification in the presence of two subscribing witnesses.

SPENCER FREEMAN. RICHARD orooLE,

Witnesses:

Crms. R. BuLLoUcH,

, QEMMIE C. BARRINGER. 7 

